Year	Number of
1990	126.21
1991	127.1
1992	118.88
1993	111.65
1994	108.47
1995	107.03
1996	114.03
1997	120.54
1998	129.9
1999	134.11
2000	132.16
2001	125.61
2002	119.1
2003	113.16
2004	107.78
2005	103.07
2006	102.3
2007	100.92
2008	101.42
2009	103.06
2010	105.71
2011	106.96
2012	107.81
2013	111.92
2014	115.74
2015	120
2016	124.24